Not sure if this is correct place for this I've searched for hours cant find correct answers or somthing close to my application
I have a 1987 Pontiac firebird 305 with the ecm and computer controlled quadrajet. I would like to swap to my 1405 edelbrock and hei dizzy. I have carb, dizzy , adapter plate for carb (untill I buy a new intake). My question is can I remove quadrajet carb replace with my edlebrock and replace cc dizzy with my hei dizzy and be ok on the engine side? Now on the trans side I know that I will need somthing for the locking torque converter will end up with a vaccume kit. Is there anything else besides the TV cable in the trans does the ecm controller anything else will I be able to drive it?
Dont care about emissions or anything like that just want to drive with out issue current set up doesnt run right carb leaks electronics are failing dont want to put money into those I'm fine without a computer. Thanks in advanced can text or call 3158062163 chris

 

Yes you can replace the CCC with a 1405 although it will probably run super rich on a 305 a 1406 may be a better start. You will need a vac advance distributor and a TV cable adapter. To tune the carb you will need carb tuning kit (1487 maybe?), Air fuel meter, vacuum gauge and timing light for tuning. Then you will have to spend a day or three tuning it and if you are lucky it will be almost as fast and smooth as fixing the CCC and get close to the same MPG maybe.

 

I do agree with that but the only difference between the 1405 and 1406 is electric choke they both 600cfm I beleive
What can I do about rebuilding the carb and carb kits reccomended?

 

The 1405 and 1406 are calibrated differently

The 1405 has factory JET: 1428 (.100") ROD: 1451 (.070" x .047")
The 1406 has factory JET: 1427 (.098") ROD: 1459 (.075" x .047")

Plenty of quadrajet rebuild places and kits on the net and also new carbs can be bought off the shelf here are a couple examples

https://quadrajetparts.com/quadrajet...-c-128_33.html
https://quadrajetpower.com/rebuild-services/
https://www.i-5automotive.com/produc...ochester-e4me/

 

Ok thank you for the explanation on the edelbrock that's information that if your not looking for you'll miss
And so the overall recommendation is to fix/mend what I have because going the other route is a waste of time seeing as how the result wont be greater or equal to having quadrajet?

 

I believe the swap is a waste of time on a stock motor or a mild 350. The Qjet can flow 750CFM and works well when installed correctly a rod swap can help with a hotter motor. Unless someone already went in there and cut everything to make the car "old school" you will probably save money just replacing the qjet

 

Ok thanks midias I will mend and fix what I have I'd like to drive it soon so dont wanna be messing anything up lmao untill I get a bigger motor I'll leave it as is it currently runs with all that stuff in it
Now if I keep it the way it is can I remove the air injection system someone already removed pump but left the lines going into manifolds and if I take that stuff out and plug the hole will everything function fine?

 

https://cliffshighperformance.com/

I would talk to these guys they can probably get you setup with w/e you need for most any motor.

Yes you can remove the lines and plug the holes

 

Awesome thanks

 

Lots of people have done it, but lots of people have also hacked up the throttle and tv cables, and the fuel line, only to figure out that a 1" thick adapter on top of the stock intake, plus a Carter style carb, results in a combo that won't fit under a typical aircleaner and/or the stock hood. That's before you fight with getting the tv cable geometry right for the 700r4.

Just between you and me, you're better off with a stock replacement Q-jet for an older GM car. Get back to about 1979 or so in a Caprice or Camaro, any car (not truck) and you'll have a much closer to bolt on and go carb. Look at the prospective carb, note the fuel inlet location, look at the choke pull off, look at the throttle arm. If they all match your stock carb, aside from not having the electronic connections, it's an easy swap.

Holleys aren't much different, most are square bore, and wont fit under the stock aircleaner without a spacer ring, and the adapter will make the entire works too tall. The exception are the Holly 4bbls they used to sell as a bolt on replacement for the Qjet, but they're fairly uncommon now, not something you're overly likely to find on a shelf.

 

Good point didn't really think about that I think I'm going to keep what I have and find a quadrajet when I can that's not cc thanks for the input

 

A square bore carb can be OK, IF you can swap the intake to one with either a dual pattern or square bore pattern. Then you just have to work out the throttle linkage, and fuel line. The TV cable for the 700R4 is pretty common, standard stuff. Jump on the Google and search a little and you'll find plenty on hooking a 700R4 TV cable up to a Holley or Edelbrock carb.

What really screws up Qjet to anything else swaps is the stock intake and it's spread bore pattern. Those 1" thick adapters take up too much space. With a proper intake, you can dump the adapter and it makes things easier, you just have to deal with the throttle linkages that were designed to bolt to the stock intake, and won't fit 90% of aftermarket intakes unless they're intended to work with those applications. The Weiand intake I had on my Malibu wasn't too happy about working with the 1980 throttle cable bracket, on the other hand the ZZ4 intake we used on my buddies 83 Monte Carlo bolted right up to the stock Qjet throttle cable bracket. There's something to be said for spending a bit more on a part designed to interchange with stock stuff, it'll save headaches of running back and forth to the parts store, and returning things that don't fit. I loved the Holley 600cfm carb on that Weiand intake, but it was just a fight. Fortunately that specific intake was setup for both a spread bore or square bore, so I picked up a late 70's Qjet and bolted that on, cured a lot of issues.

Another thing to consider is that the primaries on a Qjet are fantastic for gas mileage, and the huge secondaries are great for performance. You get the best of both worlds. It's a bit more complicated than a Holley or Carter (Edelbrock) it's also the most modern of the three and lasted a long time before losing out to TBI.

 

Yeah I agree with you there I have all the geometry correct brackets to do this swap after talking to summit and jegs and doing research I have all the stuff to do the swap just disnt know about the tranny if it was computer controlled besides torque converter lock up I know that one but if it would shift correctly or not

 

No computer control on the 700 beyond lock up, just gotta be careful about the tv cable geometry. If the bracket isn't in the right place relative to the carb, and if the cable isn't extended the right amount to match the throttle position, it can damage the trans.

 

Yeah I read numerous amounts of sites pages and how toos about the TV cable but I think I'm going to stick with what I have untill I find a 5speed setup then it's all a walk in the park lol

 

 

My 1985 z28 was originally a CC quadrajet, but a previous owner ditched it for a Holley so I no longer had the original carb. When I rebuilt the 305 I put in an edelbrock 1406 and tuned it. It runs very good and I'm a big fan of that carburetor, but not so much in a 3rd gen camaro. It gets so hot under there my fuel always boils and floods the engine when I shut it down. It will eventually come off and get replaced by an aftermarket TBI unit.

I wish I still had the original quadrajet setup on it.